* tag 'v0.6.4':
Update version to 0.6.4
Fix slightly insulting error message.
on os x we need to include the proper files in order to have IPv6_PKTINFO
pud: include nmealib v1.0.3
pud: force pending buffer out if not enough space for our message
Pud: Do not use the variable name strlen.

The olsr_delete_gateway_entry function now is a wrapper around
the olsr_delete_gateway_tree_entry function. The latter function
will be used by the cleanup function later on, to prevent needless
iterations on the gateway tree.

Coverity:
CID 739688 (#1 of 1): Dereference before null check (REVERSE_INULL)
Null-checking "in->cnf" suggests that it may be null, but it has already
been dereferenced on all paths leading to the check.

Coverity:
CID 739670 (#1 of 1): Out-of-bounds access (OVERRUN)
At (46): Overrunning struct type in_addr of 4 bytes by passing it to a
function which accesses it at byte offset 15 using argument
"16UL".

CID 739656 (#1 of 4): Argument cannot be negative (NEGATIVE_RETURNS)
At (7): "encapsulatingSkfd" is passed to a parameter that cannot be
negative.
CID 739656 (#2 of 4): Argument cannot be negative (NEGATIVE_RETURNS)
At (9): "encapsulatingSkfd" is passed to a parameter that cannot be
negative.
CID 739656 (#3 of 4): Argument cannot be negative (NEGATIVE_RETURNS)
At (12): "capturingSkfd" is passed to a parameter that cannot be
negative.
CID 739656 (#4 of 4): Argument cannot be negative (NEGATIVE_RETURNS)
At (11): "encapsulatingSkfd" is passed to a parameter that cannot be
negative.

Coverity:
CID 739656 (#5 of 8): Argument cannot be negative (NEGATIVE_RETURNS)
At (6): "encapsulatingSkfd" is passed to a parameter that cannot be
negative.
CID 739656 (#7-8 of 8): Argument cannot be negative (NEGATIVE_RETURNS)
At (8): "encapsulatingSkfd" is passed to a parameter that cannot be
negative.